/*
 * Copyright (c) 2011 Seoul National University
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Authors: Jung Ho Ahn  ( gajh@snu.ac.kr )
 *          Sungwoo Choo ( choos@snu.ac.kr )
 *
 */

#ifndef __BARRIERUTIL_H__
#define __BARRIERUTIL_H__

#include <pthread.h>

#if defined(WITH_BARRIER) || defined(CYGWIN) || defined(DARWIN) || defined(__MACOSX__) || defined(__APPLE__)
#define pthread_barrier_t barrier_t
#define pthread_barrier_attr_t barrier_attr_t
#define pthread_barrier_init(b,a,n) barrier_init(b,n)
#define pthread_barrier_destroy(b) barrier_destroy(b)
#define pthread_barrier_wait(b) barrier_wait(b)
#endif

typedef struct 
{
    int needed;
    int called;
    pthread_mutex_t mutex;
    pthread_cond_t cond;
} barrier_t;

int barrier_init(barrier_t *barrier, int needed);
int barrier_destroy(barrier_t *barrier);
int barrier_wait(barrier_t *barrier);

#endif
